เศษส่วนตรรกยะรูปมาตรฐาน

from math import gcd

def reduce_fraction(numerator, denominator):
    if any(type(v) is not int for v in (numerator, denominator)):
        raise ValueError("integer.required")
    if denominator == 0:
        raise ValueError("denominator.zero")
    if denominator < 0:
        numerator, denominator = -numerator, -denominator
    divisor = gcd(numerator, denominator)
    return numerator // divisor, denominator // divisor